Sofa



FIG. 1 is a front view of a sofa according to an embodiment of the invention.

FIG. 2 is a top view of a sofa according to an embodiment of the invention.

FIG. 3 is a back view of a sofa according to an embodiment of the invention; and,

FIG. 4 is a side view of a sofa according to an embodiment of the invention, the view from the opposite side being a mirror-image thereof. 

We claim the ornamental design for sofa, as shown and described. 